A particle's position is given by x 13 0 12 00 t 3 t 2 , in which x is in meters and t is in seconds (a) What is its velocity at t 1 s (b) Is it moving in the positive or negative direction of x just then (c) What is its speed just then (d) Is the speed increasing or decreasing just then (Try answering the next two questions without further calculation ) (e) Is there ever an instant when the velocity is zero If so, give the time t if not, answer 0 (f) Is there a time after t 3 s when the particle is moving in the negative direction of x If so, give the time t if not, answer 0 (a) Number Type your answer for part (a) here Units Choose your answer for part (a) here NWkgm ssJm s 2degreesm (b) Choose your answer for part (b) here positivenegative (c) Number Type your answer for part (c) here Units Choose your answer for part (c) here m sdegreessWNJm s 2mkg (d) Choose your answer for part (d) here increasingdecreasing (e) Number Type your answer for part (e) here Units Choose your answer for part (e) here m s 2kgdegreesNWJsm sm (f) Number Type your answer for part (f) here Units Choose your answer for part (f) here mkgdegreesWJm ssm s 2N

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Question: A particle's position is given by x = 13.0 - 12.00 t + 3 t 2 , in which x is in meters and t

A particle's position is given by x = 13.0 - 12.00t + 3t², in which x is in meters and t is in seconds. (a) What is its velocity at t = 1 s? (b) Is it moving in the positive or negative direction of x just then? (c) What is its speed just then? (d) Is the speed increasing or decreasing just then? (Try answering the next two questions without further calculation.) (e) Is there ever an instant when the velocity is zero? If so, give the time t; if not, answer "0". (f) Is there a time after t = 3 s when the particle is moving in the negative direction of x? If so, give the time t; if not, answer "0".

(a)	Number	Type your answer for part (a) here	Units	Choose your answer for part (a) here NWkgm/ssJm/s^2degreesm
(b)	Choose your answer for part (b) here positivenegative
(c)	Number	Type your answer for part (c) here	Units	Choose your answer for part (c) here m/sdegreessWNJm/s^2mkg
(d)	Choose your answer for part (d) here increasingdecreasing
(e)	Number	Type your answer for part (e) here	Units	Choose your answer for part (e) here m/s^2kgdegreesNWJsm/sm
(f)	Number	Type your answer for part (f) here	Units	Choose your answer for part (f) here mkgdegreesWJm/ssm/s^2N

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